The BASSBOSS VS21 MK3 single-21" subwoofer paired with the AT212 MK3 dual-12" top is one of the most popular combos in the lineup. This video shows the pairing in action, the coverage, the low end, and why it works for DJs and venues alike. Fullblast Sound is a family-owned authorized BASSBOSS dealer in San Antonio, TX, nationwide install, freight, and system design.